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/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.flink.runtime.healthmanager.plugins.detectors;
import org.apache.flink.api.common.JobID;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.configuration.ConfigOption;
import org.apache.flink.configuration.ConfigOptions;
import org.apache.flink.runtime.healthmanager.HealthMonitor;
import org.apache.flink.runtime.healthmanager.RestServerClient;
import org.apache.flink.runtime.healthmanager.metrics.JobTMMetricSubscription;
import org.apache.flink.runtime.healthmanager.metrics.MetricProvider;
import org.apache.flink.runtime.healthmanager.metrics.timeline.TimelineAggType;
import org.apache.flink.runtime.healthmanager.plugins.Detector;
import org.apache.flink.runtime.healthmanager.plugins.Symptom;
import org.apache.flink.runtime.healthmanager.plugins.symptoms.JobVertexLongTimeFullGC;
import org.apache.flink.runtime.healthmanager.plugins.utils.MetricNames;
import org.apache.flink.runtime.healthmanager.plugins.utils.MetricUtils;
import org.apache.flink.runtime.jobgraph.ExecutionVertexID;
import org.apache.flink.runtime.jobgraph.JobVertexID;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.stream.Collectors;
/**
* This detector detects full GCs' time of a job.
* Detects {@link JobVertexLongTimeFullGC} on locating TaskManager of any task of the vertex,
* full gc occur count is higher than the threshold within the interval.
*/
public class LongTimeFullGCDetector implements Detector {
private static final Logger LOGGER = LoggerFactory.getLogger(LongTimeFullGCDetector.class);
public static final ConfigOption FULL_GC_TIME_THRESHOLD =
ConfigOptions.key("healthmonitor.full-gc-detector.time.threshold.ms").defaultValue(5000L);
public static final ConfigOption FULL_GC_TIME_SEVERE_THRESHOLD =
ConfigOptions.key("healthmonitor.full-gc-detector.time.severe-threshold.ms").defaultValue(10000L);
public static final ConfigOption FULL_GC_TIME_RATIO_THRESHOLD =
ConfigOptions.key("healthmonitor.full-gc-detector.time.ratio.threshold").defaultValue(0.3);
public static final ConfigOption FULL_GC_TIME_RATIO_SEVERE_THRESHOLD =
ConfigOptions.key("healthmonitor.full-gc-detector.time.ratio.severe_threshold").defaultValue(0.5);
private JobID jobID;
private RestServerClient restServerClient;
private MetricProvider metricProvider;
private HealthMonitor monitor;
private long gcTimeThreshold;
private long gcTimeSevereThreshold;
private double gcTimeRatioThreshold;
private double gcTimeRatioSevereThreshold;
private long gcCheckInterval;
private JobTMMetricSubscription gcTimeSubscription;
private JobTMMetricSubscription gcCountSubscription;
private JobTMMetricSubscription intervalGCTimeSubscription;
@Override
public void open(HealthMonitor monitor) {
this.monitor = monitor;
jobID = monitor.getJobID();
restServerClient = monitor.getRestServerClient();
metricProvider = monitor.getMetricProvider();
gcCheckInterval = monitor.getConfig().getLong(FrequentFullGCDetector.FULL_GC_CHECK_INTERVAL);
gcTimeThreshold = monitor.getConfig().getLong(FULL_GC_TIME_THRESHOLD);
gcTimeSevereThreshold = monitor.getConfig().getLong(FULL_GC_TIME_SEVERE_THRESHOLD);
gcTimeRatioThreshold = monitor.getConfig().getDouble(FULL_GC_TIME_RATIO_THRESHOLD);
gcTimeRatioSevereThreshold = monitor.getConfig().getDouble(FULL_GC_TIME_RATIO_SEVERE_THRESHOLD);
gcTimeSubscription = metricProvider.subscribeAllTMMetric(jobID, MetricNames.FULL_GC_TIME_METRIC, 1, TimelineAggType.RANGE);
gcCountSubscription = metricProvider.subscribeAllTMMetric(jobID, MetricNames.FULL_GC_COUNT_METRIC, 1, TimelineAggType.RANGE);
intervalGCTimeSubscription = metricProvider.subscribeAllTMMetric(jobID, MetricNames.FULL_GC_TIME_METRIC, gcCheckInterval, TimelineAggType.RANGE);
}
@Override
public void close() {
if (metricProvider != null && gcTimeSubscription != null && gcCountSubscription != null && intervalGCTimeSubscription != null) {
metricProvider.unsubscribe(gcTimeSubscription);
metricProvider.unsubscribe(gcCountSubscription);
metricProvider.unsubscribe(intervalGCTimeSubscription);
gcTimeSubscription = null;
gcCountSubscription = null;
intervalGCTimeSubscription = null;
}
}
@Override
public Symptom detect() {
LOGGER.debug("Start detecting.");
Map> gcTime = gcTimeSubscription.getValue();
Map> gcCount = gcCountSubscription.getValue();
Map> intervalGCTime = intervalGCTimeSubscription.getValue();
Map> intervalGCTimePartial = intervalGCTimeSubscription.getPartialValue();
if ((gcTime == null || gcTime.isEmpty()) && (intervalGCTime == null || intervalGCTime.isEmpty())
&& (intervalGCTimePartial == null || intervalGCTimePartial.isEmpty())) {
return null;
}
boolean severe = false;
boolean critical = false;
Set jobVertexIDs = new HashSet<>();
for (String tmId : gcTime.keySet()) {
if (!gcCount.containsKey(tmId)
|| !MetricUtils.validateTmMetric(monitor, 1, gcTime.get(tmId), gcCount.get(tmId))
|| gcCount.get(tmId).f1 < 1) {
LOGGER.debug("Skip tm {}, GC metrics missing.", tmId);
continue;
}
double perGCDeltaTime = gcTime.get(tmId).f1 / gcCount.get(tmId).f1;
if (perGCDeltaTime > gcTimeThreshold) {
List jobExecutionVertexIds = restServerClient.getTaskManagerTasks(tmId);
if (jobExecutionVertexIds != null) {
jobVertexIDs.addAll(jobExecutionVertexIds.stream().map(ExecutionVertexID::getJobVertexID).collect(
Collectors.toList()));
}
if (perGCDeltaTime > gcTimeSevereThreshold) {
severe = true;
critical = true;
}
}
LOGGER.debug("tm {} gc time {}", tmId, perGCDeltaTime);
}
for (String tmId : intervalGCTime.keySet()) {
if (!MetricUtils.validateTmMetric(monitor, gcCheckInterval * 2, intervalGCTime.get(tmId))) {
LOGGER.debug("Skip tm {}, total GC metrics missing.", tmId);
continue;
}
LOGGER.debug("tm {} total gc time in interval {}", tmId, intervalGCTime.get(tmId).f1);
double ratio = intervalGCTime.get(tmId).f1 / gcCheckInterval;
if (ratio > gcTimeRatioThreshold) {
List jobExecutionVertexIds = restServerClient.getTaskManagerTasks(tmId);
if (jobExecutionVertexIds != null) {
jobVertexIDs.addAll(jobExecutionVertexIds.stream().map(ExecutionVertexID::getJobVertexID).collect(
Collectors.toList()));
}
if (ratio > gcTimeRatioSevereThreshold) {
severe = true;
critical = true;
}
}
}
for (String tmId : intervalGCTimePartial.keySet()) {
if (!MetricUtils.validateTmMetric(monitor, gcCheckInterval * 2, intervalGCTime.get(tmId))) {
LOGGER.debug("Skip tm {}, total GC metrics missing.", tmId);
continue;
}
LOGGER.debug("tm {} partial gc time in interval {}", tmId, intervalGCTime.get(tmId).f1);
double ratio = intervalGCTime.get(tmId).f1 / gcCheckInterval;
if (ratio > gcTimeRatioThreshold) {
List jobExecutionVertexIds = restServerClient.getTaskManagerTasks(tmId);
if (jobExecutionVertexIds != null) {
jobVertexIDs.addAll(jobExecutionVertexIds.stream().map(ExecutionVertexID::getJobVertexID).collect(
Collectors.toList()));
}
if (ratio > gcTimeRatioSevereThreshold) {
severe = true;
critical = true;
}
}
}
if (jobVertexIDs != null && !jobVertexIDs.isEmpty()) {
LOGGER.info("Long time full gc detected for vertices {}.", jobVertexIDs);
return new JobVertexLongTimeFullGC(jobID, new ArrayList<>(jobVertexIDs), severe, critical);
}
return null;
}
}
